sysreset: socfpga: Use parent device for reading base address

This driver is a child of the rstmgr driver, both of which share the
same devicetree node. As a result, passing the child's udevice pointer
to dev_read_addr_ptr results in a failure of reading the #address-cells
property. Use the parent udevice pointer instead.

Signed-off-by: Paweł Anikiel <pan@semihalf.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/sysreset/sysreset_socfpga.c

@@ -40,7 +40,7 @@ static int socfpga_sysreset_probe(struct udevice *dev)
 {
 	struct socfpga_sysreset_data *data = dev_get_priv(dev);
 
-	data->rstmgr_base = dev_read_addr_ptr(dev);
+	data->rstmgr_base = dev_read_addr_ptr(dev_get_parent(dev));
 	return 0;
 }